This doesn't look like a memory leak - if it was a memory leak the growth in RSS
wouldn't stop.
You shouldn't pay any attention to the VSS, figure, basically. If you look at
the pmap output for the panel you'll see that most of that is taken up by the
icon theme cache mapped into memory. This is read-only, and thus shared.

Erm ... OK (sorry). Just one question (for my info, not a whinge) - do you know
why the "SHR" column of ps isn't reflecting the sharing of those mappings (the
caches)? I can see the mappings, you were quite right, just not sure why they're
not "looking" like they're shared, apart from the read-only marking.

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